Finding the Fourth Proportional to 11,275.29, 16,916.72 and 5,431.23

Step by Step Solution

1. Step 1: Write the proportion equation
   11,275.29 : 16,916.72 = 5,431.23 : x
2. Step 2: Convert to fraction form
   11,275.29/16,916.72 = 5,431.23/x
3. Step 3: Cross multiply
   11,275.29x = 16,916.72 × 5,431.23
4. Step 4: Simplify right side
   11,275.29x = 91,878,570.01
5. Step 5: Solve for x
   x = 91,878,570.01/11,275.29
6. Step 6: Final answer
   x = 8,148.67